Hyundai Sonata: Charging System / Alternator Schematic Diagrams

Hyundai Sonata LF 2014-2019 Service Manual / Engine Electrical System / Charging System / Alternator Schematic Diagrams

Circuit Diagram

•	COM signal - When controlling the voltage generated, the ECM sends the target voltage data to the alternator via a PWM signal.(High voltage: 4V or higher, low voltage: 2V or lower)

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FR signal - The transistor activation signal inside the alternator monitors the voltage generated by the alternator to control the excitation current before it sends the FR signal to the ECM. (At certain RPM/electric loads, the FR duty can remain static. However, more often, the RPM, electric load, target voltage, etc. are always changing in the vehicle, so the FR must also change constantly)

•	L signal - Turns on the battery warning lamp on the dashboard when the battery charging system malfunctions. (Conditions for turning on the lamp - overcharge, over discharge, a field coil blown inside the alternator)

•	B+ terminal - The output voltage from the generator travels to the battery via the B+ terminal.

Alternator Components and Components Location

Components 1. OAD (Overrunning Alternator Decoupler) 2. Front Bracket3. Front Bearing4. Stator5. Rotor6. Rear Bearing7. Rear Bracket8. Brush Holder Assembly9. Through Bolt10. Rectifier Assembly11 ...

Alternator Repair procedures

Removal 1. Disconnect the battery negative terminal. 2. Loosen the mounting bolts (A) and then, turn the adjusting bolt (B) clockwise to loosen tension. 3. Remove the drive belt (A). 4. ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Front Seat Outer Shield Cover Components and Components Location
Component Location 1. Front seat outer shield cover ...

Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Inspection 1. After disconnecting the vapor hose from the PCV valve, remove the PCV valve. 2. Reconnect the PCV valve to the vapor hose. 3. Inspect the PCV vlave operation. (1) Run the engine at idle. (2) Put a finger on the open end of the PCV valve. (3) Make sure that intake ...